Commitments and contingencies -Schedule of Puerto Rico Government by Maturity (Details) - PR Government Direct Exposure - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Direct exposure to the puerto rico government by maturity
Total Outstanding	$ 414,696	$ 342,900
Total Exposure	464,096	391,300
Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	7,122	8,800
Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	407,574	$ 333,200
Central Government
Direct exposure to the puerto rico government by maturity
Total Outstanding	42
Total Exposure	47,442
Central Government | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	42
Central Government | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	0
Central Government | Within 1 year
Direct exposure to the puerto rico government by maturity
Total Outstanding	42
Total Exposure	47,442
Central Government | Within 1 year | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	42
Central Government | Within 1 year | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	0
Municipalities
Direct exposure to the puerto rico government by maturity
Total Outstanding	414,654
Total Exposure	416,654
Municipalities | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	7,080
Municipalities | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	407,574
Municipalities | Within 1 year
Direct exposure to the puerto rico government by maturity
Total Outstanding	14,294
Total Exposure	16,294
Municipalities | Within 1 year | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	2,720
Municipalities | Within 1 year | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	11,574
Municipalities | After 1 to 5 years
Direct exposure to the puerto rico government by maturity
Total Outstanding	130,495
Total Exposure	130,495
Municipalities | After 1 to 5 years | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	3,910
Municipalities | After 1 to 5 years | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	126,585
Municipalities | After 5 to 10 years
Direct exposure to the puerto rico government by maturity
Total Outstanding	238,874
Total Exposure	238,874
Municipalities | After 5 to 10 years | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	450
Municipalities | After 5 to 10 years | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	238,424
Municipalities | After 10 years
Direct exposure to the puerto rico government by maturity
Total Outstanding	30,991
Total Exposure	30,991
Municipalities | After 10 years | Investment Portfolio
Direct exposure to the puerto rico government by maturity
Total Outstanding	0
Municipalities | After 10 years | Loans
Direct exposure to the puerto rico government by maturity
Total Outstanding	$ 30,991